<script><br> function position (x,y){<br> this.x = x;<br> this.y = y;<br> }<br><br> var canvas = document.getElementById('canvas'),<br> ctx = canvas.getContext('2d');<br> width = canvas.width,<br> height = canvas.height;<br> ctx.fillStyle = "#FF0000";<br> ctx.font = "20px Arial";<br> ctx.fillText("妈妈",10,50);<br><br> var pixs = ctx.getImageData(0,0,width,height).data;<br> var Pixels = new Array();<br><br> for(var i=0;i<pixs.length;i = 4)<BR> {<BR> var r = pixs[i],<BR> g = pixs[i 1],<BR> b = pixs[i 2],<BR> a = pixs[i 3];<br><br> if(r != 0 || g != 0 || b != 0 ){<BR> var x = i@0;<BR> var y = i/400;<BR> Pixels.push(new position(x,y));<BR> }<BR> }<br><br> </script>
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
